Salim bin Abi al-Ja'd (may Allah have mercy on him) said: Sayyiduna Ali (may Allah be pleased with him) said: I was a man who loved war. So when Sayyiduna al-Hasan was born, I intended to name him Harb, but the Messenger of Allah (peace and blessings be upon him) named him Hasan. Then when Sayyiduna al-Husayn was born, I intended to name him Harb, but the Messenger of Allah (peace and blessings be upon him) named him Husayn, and he said: "I have named these two sons of mine after the names of the two sons of Harun (peace be upon him), Shabbar and Shubayr."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2764